A Drug Development Process flowchart represents the overall drug development process. All activities involved in transforming a compound from a drug candidate (the end-product of the discovery phase) to a product approved for marketing by the appropriate regulatory authorities are drug development. This Drug Development Process flowchart also depicts four stages of drug development: Discovery and Development, Preclinical Research, Clinical Research, F.D.A. Drug Review, and F.D.A. Post-Market Drug Safety Monitoring. A pharmaceutical company first submits a New Drug Application, after which the F.D.A. reviews the drug and either approves or rejects it. Finally, an F.D.A. advisory committee weighs in. The F.D.A. post-market drug safety monitoring is the final step in drug development.